Relative partition function of Coulomb plus delta interaction
Sergio Albeverio
Universität Bonn, GermanyClaudio Cacciapuoti
Università dell'Insubria, Como, ItalyMauro Spreafico
Università del Salento & INFN, Lecce, Italy
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Abstract
The relative partition function and the relative zeta function of the perturbation of the Laplace operator by a Coulomb potential plus a point interaction centered in the origin is discussed. Applications to the study of the Casimir effect are indicated.